Frequent Questions

What federal, state, or local standards exist that address radiation in precipitation?

There are no EPA standards for radionuclides in precipitation. RadNet precipitation sampling results help establish trends and serve as a reference during radiological incidents. Scientists can use the information to predict wet deposition concentrations during an emergency and can also use the data to validate atmospheric dispersion model output.

For more information about precipitation sampling analysis and results, visit Envirofacts on EPA.gov.